Duplex Interface Failure - Xerox Phaser 7400 Service Manual

Duplex Interface Failure

Error occurs only after the detection of a properly installed and functioning Duplex
Unit.
Applicable Status Code:
Code U12: Communication lost with Duplex Unit
Initial Actions:
Reseat the Duplex Unit
Cycle the printer's power.
If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts
Duplex Unit, PL16.1.0
Motor Driver Board, PL2.1.10
Troubleshooting Procedure Table
Step Actions and Questions
1
Check the Duplex Unit connector for
damage.
Is the connector damaged?
2 Check all pins on the DUPLEX Harness for
continuity.
Disconnect the DUPLEX Harness.
Is the DUPLEX Harness conductive?
3 Check all pins of the DRV1 harness for
continuity.
Disconnect the DRV1 ribbon cable.
Is the cable conductive?
Error Messages and Codes
Wiring and Plug/Jack References
Print Engine Map 5 (page 10-8)
Print Engine Motor Driver Board (5/6) (page 10-35)
Options Duplex Unit Sensors and Interconnect
Yes
Replace the
connector.
Replace the Motor
Driver Board
(page 8-141). If the
error persists, go to
Step 3.
Replace the Engine
Control Board
(page 8-112).
No
Replace the
Duplex Unit. If the
error persists, go
to Step 2.
Replace the
DUPLEX Harness.
Replace the DRV1
Harness.
3-105